add opna status display

2 files changed, 299 insertions, 51 deletions

diff --git a/fmdsp/fmdsp.c b/fmdsp/fmdsp.c
index 35ea7fd..43be966 100644
--- a/fmdsp/fmdsp.c
+++ b/fmdsp/fmdsp.c
@@ -3,6 +3,7 @@
 #include "font.h"
 #include "fmdriver/fmdriver.h"
 #include <stdio.h>
+#include "libopna/opna.h"
 
 static void vramblit(uint8_t *vram, int x, int y,
                      const uint8_t *data, int w, int h) {
@@ -52,6 +53,8 @@ void fmdsp_init(struct fmdsp *fmdsp, const struct fmdsp_font *font98) {
     fmdsp->target_palette[i] = s_palettes[0][i];
   }
   fmdsp->font98 = font98;
+  fmdsp->style = FMDSP_DISPSTYLE_DEFAULT;
+  fmdsp->style_updated = true;
 }
 
 
@@ -123,48 +126,112 @@ static void fmdsp_putline(const char *strptr, uint8_t *vram,
   }
 }
 
-void fmdsp_vram_init(struct fmdsp *fmdsp,
-                     struct fmdriver_work *work,
-                     uint8_t *vram) {
-  for (int y = 0; y < PC98_H; y++) {
+static const char *track_type_string_table[FMDRIVER_TRACKTYPE_CNT] = {
+  "FM   ", "SSG  ", "ADPCM"
+};
+
+static struct {
+  uint8_t type;
+  uint8_t num;
+} track_type_table[FMDRIVER_TRACK_NUM] = {
+  {FMDRIVER_TRACKTYPE_FM, 1},
+  {FMDRIVER_TRACKTYPE_FM, 2},
+  {FMDRIVER_TRACKTYPE_FM, 3},
+  {FMDRIVER_TRACKTYPE_FM, 3},
+  {FMDRIVER_TRACKTYPE_FM, 3},
+  {FMDRIVER_TRACKTYPE_FM, 3},
+  {FMDRIVER_TRACKTYPE_FM, 4},
+  {FMDRIVER_TRACKTYPE_FM, 5},
+  {FMDRIVER_TRACKTYPE_FM, 6},
+  {FMDRIVER_TRACKTYPE_SSG, 1},
+  {FMDRIVER_TRACKTYPE_SSG, 2},
+  {FMDRIVER_TRACKTYPE_SSG, 3},
+  {FMDRIVER_TRACKTYPE_ADPCM, 1},
+};
+
+enum {
+  FMDSP_TRACK_DISP_CNT_DEFAULT = 10
+};
+
+static uint8_t track_disp_table_default[FMDSP_TRACK_DISP_CNT_DEFAULT] = {
+  FMDRIVER_TRACK_FM_1,
+  FMDRIVER_TRACK_FM_2,
+  FMDRIVER_TRACK_FM_3,
+  FMDRIVER_TRACK_FM_4,
+  FMDRIVER_TRACK_FM_5,
+  FMDRIVER_TRACK_FM_6,
+  FMDRIVER_TRACK_SSG_1,
+  FMDRIVER_TRACK_SSG_2,
+  FMDRIVER_TRACK_SSG_3,
+  FMDRIVER_TRACK_ADPCM,
+};
+static uint8_t track_disp_table_opn[FMDSP_TRACK_DISP_CNT_DEFAULT] = {
+  FMDRIVER_TRACK_FM_1,
+  FMDRIVER_TRACK_FM_2,
+  FMDRIVER_TRACK_FM_3,
+  FMDRIVER_TRACK_FM_3_EX_1,
+  FMDRIVER_TRACK_FM_3_EX_2,
+  FMDRIVER_TRACK_FM_3_EX_3,
+  FMDRIVER_TRACK_SSG_1,
+  FMDRIVER_TRACK_SSG_2,
+  FMDRIVER_TRACK_SSG_3,
+  FMDRIVER_TRACK_ADPCM,
+};
+
+static void fmdsp_track_init_10(struct fmdsp *fmdsp,
+                                uint8_t *vram) {
+  for (int y = 0; y < TRACK_H*FMDSP_TRACK_DISP_CNT_DEFAULT; y++) {
     for (int x = 0; x < PC98_W; x++) {
       vram[y*PC98_W+x] = 0;
     }
   }
-  for (int t = 0; t < 10; t++) {
-    struct fmdriver_track_status *track = &work->track_status[t];
+  for (int i = 0; i < FMDSP_TRACK_DISP_CNT_DEFAULT; i++) {
+    int t = (fmdsp->style == FMDSP_DISPSTYLE_DEFAULT) ?
+            track_disp_table_default[i] :
+            track_disp_table_opn[i];
     const char *track_type;
-    switch (track->type) {
-    case FMDRIVER_TRACK_FM:
+    switch (track_type_table[t].type) {
+    case FMDRIVER_TRACKTYPE_FM:
       track_type = "FM   ";
       break;
-    case FMDRIVER_TRACK_SSG:
+    case FMDRIVER_TRACKTYPE_SSG:
       track_type = "SSG  ";
       break;
-    case FMDRIVER_TRACK_ADPCM:
+    case FMDRIVER_TRACKTYPE_ADPCM:
       track_type = "ADPCM";
       break;
     }
-    fmdsp_putline(track_type, vram, &font_fmdsp_small, 1, TRACK_H*t, 2, true);
-    vramblit(vram, NUM_X+NUM_W*0, TRACK_H*t+1, s_num[(track->num/10)%10], NUM_W, NUM_H);
-    vramblit(vram, NUM_X+NUM_W*1, TRACK_H*t+1, s_num[track->num%10], NUM_W, NUM_H);
+    fmdsp_putline(track_type, vram, &font_fmdsp_small, 1, TRACK_H*i, 2, true);
+    int tracknum = track_type_table[t].num;
+    vramblit(vram, NUM_X+NUM_W*0, TRACK_H*i+1, s_num[(tracknum/10)%10], NUM_W, NUM_H);
+    vramblit(vram, NUM_X+NUM_W*1, TRACK_H*i+1, s_num[tracknum%10], NUM_W, NUM_H);
 
-    //vramblit(vram, 1, TRACK_H*t+7, s_track, TNAME_W, TNAME_H);
-    fmdsp_putline("TRACK.", vram, &font_fmdsp_small, 1, TRACK_H*t+6, 1, true);
-    vramblit(vram, KEY_LEFT_X, TRACK_H*t+KEY_Y, s_key_left, KEY_LEFT_W, KEY_H);
-    for (int i = 0; i < KEY_OCTAVES; i++) {
-      vramblit(vram, KEY_X+KEY_W*i, TRACK_H*t+KEY_Y,
+    fmdsp_putline("TRACK.", vram, &font_fmdsp_small, 1, TRACK_H*i+6, 1, true);
+    vramblit(vram, KEY_LEFT_X, TRACK_H*i+KEY_Y, s_key_left, KEY_LEFT_W, KEY_H);
+    for (int j = 0; j < KEY_OCTAVES; j++) {
+      vramblit(vram, KEY_X+KEY_W*j, TRACK_H*i+KEY_Y,
                 s_key_bg, KEY_W, KEY_H);
     }
-    vramblit(vram, KEY_X+KEY_W*KEY_OCTAVES, TRACK_H*t+KEY_Y,
+    vramblit(vram, KEY_X+KEY_W*KEY_OCTAVES, TRACK_H*i+KEY_Y,
              s_key_right, KEY_RIGHT_W, KEY_H);
-    vramblit_color(vram, BAR_L_X, TRACK_H*t+BAR_Y,
+    vramblit_color(vram, BAR_L_X, TRACK_H*i+BAR_Y,
                    s_bar_l, BAR_L_W, BAR_H, 3);
-    for (int i = 0; i < BAR_CNT; i++) {
-      vramblit_color(vram, BAR_X+BAR_W*i, TRACK_H*t+BAR_Y,
+    for (int j = 0; j < BAR_CNT; j++) {
+      vramblit_color(vram, BAR_X+BAR_W*j, TRACK_H*i+BAR_Y,
                 s_bar, BAR_W, BAR_H, 3);
     }
   }
+}
+
+void fmdsp_vram_init(struct fmdsp *fmdsp,
+                     struct fmdriver_work *work,
+                     uint8_t *vram) {
+  fmdsp->style_updated = true;
+  for (int y = 0; y < PC98_H; y++) {
+    for (int x = 0; x < PC98_W; x++) {
+      vram[y*PC98_W+x] = 0;
+    }
+  }
   vramblit(vram, PLAYING_X, PLAYING_Y,
            s_playing, PLAYING_W, PLAYING_H);
   for (int x = 74; x < PC98_W; x++) {
@@ -219,25 +286,187 @@ static void fmdsp_palette_fade(struct fmdsp *fmdsp) {
   }
 }
 
+static void fmdsp_track_info_fm(const struct opna *opna,
+                                int chi, const bool *slotmask,
+                                int x, int y,
+                                uint8_t *vram
+) {
+  const struct opna_fm_channel *ch = &opna->fm.channel[chi];
+  for (int si = 0; si < 4; si++) {
+    if (slotmask && slotmask[si]) continue;
+    const struct opna_fm_slot *s = &ch->slot[si];
+    int level = s->tl << 5;                // (0 - 4064)
+    int envlevel = level + (s->env<<2);
+    int leveld = (4096 - level) / 64;      // (0 - 63)
+    if (leveld < 0) leveld = 0;
+    int envleveld = (4096 - envlevel) / 64;
+    if (envleveld < 0) envleveld = 0;
+    for (int px = 0; px < 64; px++) {
+      int color = 3;
+      if (px < envleveld) color = 2;
+      if (px == leveld) color = 7;
+      for (int py = 0; py < 4; py++) {
+        vram[(y+2+py+si*6)*PC98_W+(x+px*2)] = color;
+      }
+    }
+    const char *envstr = "";
+    switch (s->env_state) {
+    case ENV_ATTACK:
+      envstr = "ATT";
+      break;
+    case ENV_DECAY:
+      envstr = "DEC";
+      break;
+    case ENV_SUSTAIN:
+      envstr = "SUS";
+      break;
+    case ENV_RELEASE:
+      envstr = "REL";
+      break;
+    }
+    fmdsp_putline(envstr, vram, &font_fmdsp_small, x+130, y+si*6, 1, false);
+    char strbuf[4];
+    snprintf(strbuf, sizeof(strbuf), "%03X", s->env);
+    fmdsp_putline(strbuf, vram, &font_fmdsp_small, x+150, y+si*6, 1, false);
+  }
+  char strbuf[5];
+  snprintf(strbuf, sizeof(strbuf), "%04X", ch->fnum);
+  fmdsp_putline(strbuf, vram, &font_fmdsp_small, x+170, y, 1, false);
+}
+
+static void fmdsp_track_info_ssg(const struct opna *opna,
+                                 int chi,
+                                 int x, int y,
+                                 uint8_t *vram
+) {
+  int envleveld = opna_ssg_channel_level(&opna->ssg, chi);
+  for (int px = 0; px < 64; px++) {
+    int color = 3;
+    if (px < (envleveld+31)) color = 2;
+    if (px < 32) color = 7;
+    for (int py = 0; py < 4; py++) {
+      vram[(y+2+py)*PC98_W+(x+px*2)] = color;
+    }
+  }
+}
+
+static void fmdsp_track_info_adpcm(const struct opna *opna,
+                                   int x, int y,
+                                   uint8_t *vram) {
+  fmdsp_putline("VOL DELTA  START    PTR    END",
+                vram, &font_fmdsp_small, x, y, 1, false);
+  char buf[7];
+  snprintf(buf, sizeof(buf), "%3d", opna->adpcm.vol);
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%04X", opna->adpcm.delta);
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+25, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%06X", (opna->adpcm.start)<<5);
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+50, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%06X", (opna->adpcm.ramptr)<<5);
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+85, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%06X", ((opna->adpcm.end+1)<<5)-1);
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+120, y+6, 1, false);
+}
+
+static void fmdsp_track_info_ppz8(const struct ppz8 *ppz8,
+                                  int chi,
+                                  int x, int y,
+                                  uint8_t *vram) {
+  const struct ppz8_channel *ch = &ppz8->channel[chi];
+  fmdsp_putline("PAN VOL     FREQ      PTR      END    LOOPS    LOOPE",
+                vram, &font_fmdsp_small, x, y, 1, false);
+  char buf[9];
+  if (ch->pan) {
+    int pan = ch->pan-5;
+    snprintf(buf, sizeof(buf), "%+d", pan);
+    char c = ' ';
+    if (pan < 0) c = 'L';
+    if (pan > 0) c = 'R';
+    buf[0] = c;
+  } else {
+    snprintf(buf, sizeof(buf), "--");
+  }
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+5, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%03d", ch->vol);
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+20, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%08X", ch->freq);
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+40, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%08X", (unsigned)(ch->ptr>>16));
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+85, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%08X", (unsigned)(ch->endptr>>16));
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+130, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%08X", (unsigned)(ch->loopstartptr>>16));
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+175, y+6, 1, false);
+  snprintf(buf, sizeof(buf), "%08X", (unsigned)(ch->loopendptr>>16));
+  fmdsp_putline(buf, vram, &font_fmdsp_small, x+220, y+6, 1, false);
+}
+
 void fmdsp_update(struct fmdsp *fmdsp,
-                  const struct fmdriver_work *work, uint8_t *vram) {
-  for (int t = 0; t < 10; t++) {
+                  const struct fmdriver_work *work,
+                  const struct opna *opna,
+                  uint8_t *vram) {
+  if (fmdsp->style_updated) fmdsp_track_init_10(fmdsp, vram);
+  fmdsp->style_updated = false;
+  for (int y = 0; y < 320; y++) {
+    for (int x = 320; x < PC98_W; x++) {
+      vram[y*PC98_W+x] = 0;
+    }
+  }
+  for (int it = 0; it < FMDSP_TRACK_DISP_CNT_DEFAULT; it++) {
+    int t = (fmdsp->style == FMDSP_DISPSTYLE_DEFAULT) ?
+            track_disp_table_default[it] :
+            track_disp_table_opn[it];
     const struct fmdriver_track_status *track = &work->track_status[t];
-    char track_info[5] = "    ";
+
+    if ((track->info == FMDRIVER_TRACK_INFO_PPZ8)
+         || (track->info == FMDRIVER_TRACK_INFO_PDZF)
+        && track->ppz8_ch) {
+      fmdsp_track_info_ppz8(work->ppz8, track->ppz8_ch-1,
+                            320, TRACK_H*it+6, vram);
+    } else {
+      switch (track_type_table[t].type) {
+      case FMDRIVER_TRACKTYPE_FM:
+        fmdsp_track_info_fm(opna,
+                            track_type_table[t].num-1,
+                            track->info == FMDRIVER_TRACK_INFO_FM3EX ? track->fmslotmask : 0,
+                            320, TRACK_H*it+6, vram);
+        break;
+      case FMDRIVER_TRACKTYPE_SSG:
+        fmdsp_track_info_ssg(opna,
+                            track_type_table[t].num-1,
+                            320, TRACK_H*it+6, vram);
+        break;
+      case FMDRIVER_TRACKTYPE_ADPCM:
+        fmdsp_track_info_adpcm(opna, 320, TRACK_H*it+6, vram);
+      }
+    }
+
+    const char *track_info1 = "    ";
+    char track_info2[5] = "    ";
     if (track->playing) {
       switch (track->info) {
       case FMDRIVER_TRACK_INFO_PPZ8:
-        snprintf(track_info, sizeof(track_info), "PPZ8");
+        snprintf(track_info2, sizeof(track_info2), "PPZ8");
+        break;
+      case FMDRIVER_TRACK_INFO_PDZF:
+        snprintf(track_info2, sizeof(track_info2), "PDZF");
         break;
       case FMDRIVER_TRACK_INFO_SSG_NOISE_ONLY:
-        snprintf(track_info, sizeof(track_info), "N%02X ", work->ssg_noise_freq);
+        snprintf(track_info2, sizeof(track_info2), "N%02X ", work->ssg_noise_freq);
         break;
       case FMDRIVER_TRACK_INFO_SSG_NOISE_MIX:
-        snprintf(track_info, sizeof(track_info), "M%02X ", work->ssg_noise_freq);
+        snprintf(track_info2, sizeof(track_info2), "M%02X ", work->ssg_noise_freq);
+        break;
+      case FMDRIVER_TRACK_INFO_FM3EX:
+        track_info1 = "EX  ";
+        for (int c = 0; c < 4; c++) {
+          track_info2[c] = track->fmslotmask[c] ? ' ' : ('1'+c);
+        }
         break;
       }
     }
-    fmdsp_putline(track_info, vram, &font_fmdsp_small, TINFO_X, TRACK_H*t+6, 2, true);
+    fmdsp_putline(track_info1, vram, &font_fmdsp_small, TINFO_X, TRACK_H*it+0, 2, true);
+    fmdsp_putline(track_info2, vram, &font_fmdsp_small, TINFO_X, TRACK_H*it+6, 2, true);
     char notestr[5] = " S  ";
     if (track->playing) {
       if ((track->key&0xf) == 0xf) {
@@ -252,52 +481,52 @@ void fmdsp_update(struct fmdsp *fmdsp,
       }
     }
     char numbuf[5];
-    fmdsp_putline("KN:", vram, &font_fmdsp_small, TDETAIL_X, TRACK_H*t+6, 1, true);
-    fmdsp_putline(notestr, vram, &font_fmdsp_small, TDETAIL_KN_V_X, TRACK_H*t+6, 1, true);
-    fmdsp_putline("TN:", vram, &font_fmdsp_small, TDETAIL_TN_X, TRACK_H*t+6, 1, true);
+    fmdsp_putline("KN:", vram, &font_fmdsp_small, TDETAIL_X, TRACK_H*it+6, 1, true);
+    fmdsp_putline(notestr, vram, &font_fmdsp_small, TDETAIL_KN_V_X, TRACK_H*it+6, 1, true);
+    fmdsp_putline("TN:", vram, &font_fmdsp_small, TDETAIL_TN_X, TRACK_H*it+6, 1, true);
     snprintf(numbuf, sizeof(numbuf), "%03d", track->tonenum);
-    fmdsp_putline(numbuf, vram, &font_fmdsp_small, TDETAIL_TN_V_X, TRACK_H*t+6, 1, true);
-    fmdsp_putline("VL:", vram, &font_fmdsp_small, TDETAIL_VL_X, TRACK_H*t+6, 1, true);
+    fmdsp_putline(numbuf, vram, &font_fmdsp_small, TDETAIL_TN_V_X, TRACK_H*it+6, 1, true);
+    fmdsp_putline("VL:", vram, &font_fmdsp_small, TDETAIL_VL_X, TRACK_H*it+6, 1, true);
     snprintf(numbuf, sizeof(numbuf), "%03d", track->volume);
-    fmdsp_putline(numbuf, vram, &font_fmdsp_small, TDETAIL_VL_V_X, TRACK_H*t+6, 1, true);
-    fmdsp_putline("GT:", vram, &font_fmdsp_small, TDETAIL_GT_X, TRACK_H*t+6, 1, true);
+    fmdsp_putline(numbuf, vram, &font_fmdsp_small, TDETAIL_VL_V_X, TRACK_H*it+6, 1, true);
+    fmdsp_putline("GT:", vram, &font_fmdsp_small, TDETAIL_GT_X, TRACK_H*it+6, 1, true);
     //snprintf(numbuf, sizeof(numbuf), "%03d", track->tonenum);
-    //fmdsp_putline(numbuf, vram, &font_fmdsp_small, TDETAIL_GT_V_X, TRACK_H*t+6, 1, true);
-    fmdsp_putline("DT:", vram, &font_fmdsp_small, TDETAIL_DT_X, TRACK_H*t+6, 1, true);
+    //fmdsp_putline(numbuf, vram, &font_fmdsp_small, TDETAIL_GT_V_X, TRACK_H*it+6, 1, true);
+    fmdsp_putline("DT:", vram, &font_fmdsp_small, TDETAIL_DT_X, TRACK_H*it+6, 1, true);
     if (track->detune) {
       snprintf(numbuf, sizeof(numbuf), "%+04d", track->detune);
     } else {
       snprintf(numbuf, sizeof(numbuf), " 000");
     }
-    fmdsp_putline(numbuf, vram, &font_fmdsp_small, TDETAIL_DT_V_X, TRACK_H*t+6, 1, true);
-    fmdsp_putline("M:", vram, &font_fmdsp_small, TDETAIL_M_X, TRACK_H*t+6, 1, true);
-    fmdsp_putline(track->status, vram, &font_fmdsp_small, TDETAIL_M_V_X, TRACK_H*t+6, 1, true);
+    fmdsp_putline(numbuf, vram, &font_fmdsp_small, TDETAIL_DT_V_X, TRACK_H*it+6, 1, true);
+    fmdsp_putline("M:", vram, &font_fmdsp_small, TDETAIL_M_X, TRACK_H*it+6, 1, true);
+    fmdsp_putline(track->status, vram, &font_fmdsp_small, TDETAIL_M_V_X, TRACK_H*it+6, 1, true);
     for (int i = 0; i < KEY_OCTAVES; i++) {
-      vramblit(vram, KEY_X+KEY_W*i, TRACK_H*t+KEY_Y,
+      vramblit(vram, KEY_X+KEY_W*i, TRACK_H*it+KEY_Y,
                 s_key_bg, KEY_W, KEY_H);
       if (track->playing) {
         if (track->actual_key >> 4 == i) {
-          vramblit_key(vram, KEY_X+KEY_W*i, TRACK_H*t+KEY_Y,
+          vramblit_key(vram, KEY_X+KEY_W*i, TRACK_H*it+KEY_Y,
                       s_key_mask, KEY_W, KEY_H,
                       track->actual_key & 0xf, 8);
         }
         if (track->key >> 4 == i) {
-          vramblit_key(vram, KEY_X+KEY_W*i, TRACK_H*t+KEY_Y,
+          vramblit_key(vram, KEY_X+KEY_W*i, TRACK_H*it+KEY_Y,
                       s_key_mask, KEY_W, KEY_H,
-                      track->key & 0xf, 6);
+                      track->key & 0xf, track->masked ? 8 : 6);
         }
       }
     }
-    uint8_t color_on = track->key == 0xff ? 7 : 2;
+    uint8_t color_on = ((track->key == 0xff) || track->masked) ? 7 : 2;
     if (!track->playing) color_on = 3;
-    vramblit_color(vram, BAR_L_X, TRACK_H*t+BAR_Y,
+    vramblit_color(vram, BAR_L_X, TRACK_H*it+BAR_Y,
                    s_bar_l, BAR_L_W, BAR_H, color_on);
     for (int i = 0; i < BAR_CNT; i++) {
       int c = (i < (track->ticks_left>>2)) ? color_on : 3;
-      vramblit_color(vram, BAR_X+BAR_W*i, TRACK_H*t+BAR_Y,
+      vramblit_color(vram, BAR_X+BAR_W*i, TRACK_H*it+BAR_Y,
                 s_bar, BAR_W, BAR_H, c);
     }
-    vramblit_color(vram, BAR_X+BAR_W*(track->ticks>>2), TRACK_H*t+BAR_Y,
+    vramblit_color(vram, BAR_X+BAR_W*(track->ticks>>2), TRACK_H*it+BAR_Y,
                    s_bar, BAR_W, BAR_H, 7);
   }
   fmdsp_palette_fade(fmdsp);
@@ -331,3 +560,10 @@ static void fontrom_copy_rows(uint8_t *font, const uint8_t *fontrom,
     }
   }
 }
+
+void fmdsp_dispstyle_set(struct fmdsp *fmdsp, enum FMDSP_DISPSTYLE style) {
+  if (style < 0) return;
+  if (style >= FMDSP_DISPSTYLE_CNT) return;
+  fmdsp->style = style;
+  fmdsp->style_updated = true;
+}
diff --git a/fmdsp/fmdsp.h b/fmdsp/fmdsp.h
index f123138..9a67bc7 100644
--- a/fmdsp/fmdsp.h
+++ b/fmdsp/fmdsp.h
@@ -2,12 +2,15 @@
 #define MYON_FMDSP_H_INCLUDED
 
 #include <stdint.h>
+#include <stdbool.h>
 #include "font.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+struct opna;
+
 enum {
   PC98_W = 640,
   PC98_H = 400
@@ -17,11 +20,18 @@ enum {
   FMDSP_PALETTE_COLORS = 9
 };
 
+enum FMDSP_DISPSTYLE {
+  FMDSP_DISPSTYLE_DEFAULT,
+  FMDSP_DISPSTYLE_OPN,
+  FMDSP_DISPSTYLE_CNT
+};
+
 struct fmdsp {
   uint8_t palette[FMDSP_PALETTE_COLORS*3];
   uint8_t target_palette[FMDSP_PALETTE_COLORS*3];
   const struct fmdsp_font *font98;
-
+  enum FMDSP_DISPSTYLE style;
+  bool style_updated;
 };
 
 struct fmdriver_work;
@@ -29,10 +39,12 @@ void fmdsp_init(struct fmdsp *fmdsp, const struct fmdsp_font *font);
 void fmdsp_vram_init(struct fmdsp *fmdsp,
                      struct fmdriver_work *work,
                      uint8_t *vram);
-void fmdsp_update(struct fmdsp *fmdsp, const struct fmdriver_work *work, uint8_t *vram);
+void fmdsp_update(struct fmdsp *fmdsp, const struct fmdriver_work *work,
+                  const struct opna *opna, uint8_t *vram);
 void fmdsp_vrampalette(struct fmdsp *fmdsp, const uint8_t *vram, uint8_t *vram32, int stride);
 void fmdsp_font_from_fontrom(uint8_t *font, const uint8_t *fontrom);
 void fmdsp_palette_set(struct fmdsp *fmdsp, int p);
+void fmdsp_dispstyle_set(struct fmdsp *fmdsp, enum FMDSP_DISPSTYLE style);
 #ifdef __cplusplus
 }
 #endif